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Finding the Fourth Proportional to 640,790.40, 884,275.08 and 354,303.12

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Solution

The fourth proportional to 640,790.40, 884,275.08 and 354,303.12 is: 488,929.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,790.40 : 884,275.08 = 354,303.12 : x
  2. Step 2: Convert to fraction form
    640,790.40/884,275.08 = 354,303.12/x
  3. Step 3: Cross multiply
    640,790.40x = 884,275.08 × 354,303.12
  4. Step 4: Simplify right side
    640,790.40x = 313,301,419,782.25
  5. Step 5: Solve for x
    x = 313,301,419,782.25/640,790.40
  6. Step 6: Final answer
    x = 488,929.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.